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                        iframe内嵌框架
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                        媒体标签
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                        清除样式
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                        css引入方式
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                        css选择符与选择器
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                        css字体样式
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                        图片的调整
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                        伪类选择
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                        盒子模型
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                        浮动
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                            <b>2.7.</b>
                        
                        定位
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                            <b>2.8.</b>
                        
                        阴影
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                        图片溢出处理
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                        动画
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                        动画插件与浏览器内核
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                        旋转菜单
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                        移动端
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                        rem布局
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                        权重问题
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                        移动端导航问题
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                        flex布局
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                            <b>2.18.</b>
                        
                        fullpage
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                            <b>2.19.</b>
                        
                        bootstrap
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                            <b>2.20.</b>
                        
                        媒体查询
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                            <b>3.</b>
                        
                        JavaScript的介绍
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                            <b>3.1.</b>
                        
                        JavaScript数据类型
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                            <b>3.2.</b>
                        
                        数据类型的转换
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                            <b>3.3.</b>
                        
                        运算符
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                            <b>3.4.</b>
                        
                        比较运算符
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                            <b>3.5.</b>
                        
                        赋值运算符
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                            <b>3.6.</b>
                        
                        逻辑操作符
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                            <b>3.7.</b>
                        
                        条件语句
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        <li class="chapter " data-level="3.8" data-path="md/js/条件运算符.html">
            
                
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                            <b>3.8.</b>
                        
                        条件运算符
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        <li class="chapter " data-level="3.9" data-path="md/js/位运算符.html">
            
                
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                            <b>3.9.</b>
                        
                        位运算符
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                            <b>3.10.</b>
                        
                        循环语句
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                            <b>3.11.</b>
                        
                        for循环
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                            <b>3.12.</b>
                        
                        ES6
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        <li class="chapter " data-level="3.13" data-path="md/js/es6安装.html">
            
                
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                            <b>3.13.</b>
                        
                        ES6安装
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                            <b>3.14.</b>
                        
                        内置对象
                    </a>
            
            
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                            <b>3.15.</b>
                        
                        Array对象
                    </a>
            
            
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        <li class="chapter " data-level="3.16" data-path="md/js/Date对象.html">
            
                
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                            <b>3.16.</b>
                        
                        Date对象
                    </a>
            
            
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                            <b>3.17.</b>
                        
                        布尔值对象
                    </a>
            
            
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        <li class="chapter " data-level="3.18" data-path="md/js/数学对象.html">
            
                
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                            <b>3.18.</b>
                        
                        数学对象
                    </a>
            
            
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        <li class="chapter " data-level="3.19" data-path="md/js/对象的创建.html">
            
                
                    <a href="../../md/js/对象的创建.html">
                
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                            <b>3.19.</b>
                        
                        对象的创建
                    </a>
            
            
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        <li class="chapter " data-level="3.20" data-path="md/js/BOM.html">
            
                
                    <a href="../../md/js/BOM.html">
                
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                            <b>3.20.</b>
                        
                        BOM
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.21" data-path="md/js/DOM关于元素的获取.html">
            
                
                    <a href="../../md/js/DOM关于元素的获取.html">
                
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                            <b>3.21.</b>
                        
                        DOM关于元素的获取
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.22" data-path="md/js/DOM元素对象.html">
            
                
                    <a href="../../md/js/DOM元素对象.html">
                
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                            <b>3.22.</b>
                        
                        DOM元素对象
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.23" data-path="md/js/DOM事件练习.html">
            
                
                    <a href="../../md/js/DOM事件练习.html">
                
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                            <b>3.23.</b>
                        
                        DOM事件练习
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.24" data-path="md/js/DOM鼠标事件.html">
            
                
                    <a href="../../md/js/DOM鼠标事件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.24.</b>
                        
                        DOM鼠标事件
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.25" data-path="md/js/事件代理.html">
            
                
                    <a href="../../md/js/事件代理.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.25.</b>
                        
                        事件代理
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.26" data-path="md/js/移动端事件.html">
            
                
                    <a href="../../md/js/移动端事件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.26.</b>
                        
                        移动端事件
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.27" data-path="md/js/无缝轮播图.html">
            
                
                    <a href="../../md/js/无缝轮播图.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.27.</b>
                        
                        无缝轮播图
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.28" data-path="md/js/鼠标事件练习.html">
            
                
                    <a href="../../md/js/鼠标事件练习.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.28.</b>
                        
                        鼠标事件练习
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.29" data-path="md/js/ajax.html">
            
                
                    <a href="../../md/js/ajax.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.29.</b>
                        
                        ajax
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.30" data-path="md/js/封装ajax.html">
            
                
                    <a href="../../md/js/封装ajax.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.30.</b>
                        
                        封装ajax
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.31" data-path="md/js/高德地图的使用.html">
            
                
                    <a href="../../md/js/高德地图的使用.html">
                
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                            <b>3.31.</b>
                        
                        高德地图的使用
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="3.32" data-path="md/js/预加载插件使用.html">
            
                
                    <a href="../../md/js/预加载插件使用.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>3.32.</b>
                        
                        预加载插件使用
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="4" data-path="md/jQuery/JQ变量的声明.html">
            
                
                    <a href="../../md/jQuery/JQ变量的声明.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.</b>
                        
                        JQ变量的声明
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="4.1" data-path="md/jQuery/选择器和效果.html">
            
                
                    <a href="../../md/jQuery/选择器和效果.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.1.</b>
                        
                        选择器和效果
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.2" data-path="md/jQuery/属性.html">
            
                
                    <a href="../../md/jQuery/属性.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.2.</b>
                        
                        属性
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.3" data-path="md/jQuery/尺寸.html">
            
                
                    <a href="../../md/jQuery/尺寸.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.3.</b>
                        
                        尺寸
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.4" data-path="md/jQuery/遍历.html">
            
                
                    <a href="../../md/jQuery/遍历.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.4.</b>
                        
                        遍历
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.5" data-path="md/jQuery/正则表达式.html">
            
                
                    <a href="../../md/jQuery/正则表达式.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.5.</b>
                        
                        正则表达式
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.6" data-path="md/jQuery/jQuery事件练习.html">
            
                
                    <a href="../../md/jQuery/jQuery事件练习.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.6.</b>
                        
                        jQuery事件练习
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.7" data-path="md/jQuery/操作.html">
            
                
                    <a href="../../md/jQuery/操作.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.7.</b>
                        
                        操作
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.8" data-path="md/jQuery/事件.html">
            
                
                    <a href="../../md/jQuery/事件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.8.</b>
                        
                        事件
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.9" data-path="md/jQuery/ajax.html">
            
                
                    <a href="../../md/jQuery/ajax.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.9.</b>
                        
                        ajax
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.10" data-path="md/jQuery/三级联动.html">
            
                
                    <a href="../../md/jQuery/三级联动.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.10.</b>
                        
                        三级联动
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.11" data-path="md/jQuery/滚动监听导航效果.html">
            
                
                    <a href="../../md/jQuery/滚动监听导航效果.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.11.</b>
                        
                        滚动监听导航效果
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="4.12" data-path="md/jQuery/悬停导航.html">
            
                
                    <a href="../../md/jQuery/悬停导航.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>4.12.</b>
                        
                        悬停导航
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="5" data-path="md/Vue/修饰符与条件渲染.html">
            
                
                    <a href="../../md/Vue/修饰符与条件渲染.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.</b>
                        
                        Vue修饰符与条件渲染
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="5.1" data-path="md/Vue/绑定class和style.html">
            
                
                    <a href="../../md/Vue/绑定class和style.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.1.</b>
                        
                        绑定class和style
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.2" data-path="md/Vue/排序.html">
            
                
                    <a href="../../md/Vue/排序.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.2.</b>
                        
                        排序
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.3" data-path="md/Vue/表单输入绑定.html">
            
                
                    <a href="../../md/Vue/表单输入绑定.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.3.</b>
                        
                        表单输入绑定
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.4" data-path="md/Vue/生命周期.html">
            
                
                    <a href="../../md/Vue/生命周期.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.4.</b>
                        
                        生命周期
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.5" data-path="md/Vue/自定义指令.html">
            
                
                    <a href="../../md/Vue/自定义指令.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.5.</b>
                        
                        自定义指令
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.6" data-path="md/Vue/组件.html">
            
                
                    <a href="../../md/Vue/组件.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.6.</b>
                        
                        组件
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.7" data-path="md/Vue/Vue事件练习.html">
            
                
                    <a href="../../md/Vue/Vue事件练习.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.7.</b>
                        
                        Vue事件练习
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.8" data-path="md/Vue/动态模板.html">
            
                
                    <a href="../../md/Vue/动态模板.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.8.</b>
                        
                        动态模板
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.9" data-path="md/Vue/插槽的使用.html">
            
                
                    <a href="../../md/Vue/插槽的使用.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.9.</b>
                        
                        插槽的使用
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.10" data-path="md/Vue/router.html">
            
                
                    <a href="../../md/Vue/router.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.10.</b>
                        
                        router
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.11" data-path="md/Vue/ajax与框架搭建.html">
            
                
                    <a href="../../md/Vue/ajax与框架搭建.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.11.</b>
                        
                        ajax与框架搭建
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.12" data-path="md/Vue/store.html">
            
                
                    <a href="../../md/Vue/store.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.12.</b>
                        
                        store
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="5.13" data-path="md/Vue/ref获取元素.html">
            
                
                    <a href="../../md/Vue/ref获取元素.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>5.13.</b>
                        
                        ref获取元素
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="6" data-path="md/wx/小程序.html">
            
                
                    <a href="../../md/wx/小程序.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>6.</b>
                        
                        小程序
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="6.1" data-path="md/wx/封装外部ajax路径.html">
            
                
                    <a href="../../md/wx/封装外部ajax路径.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>6.1.</b>
                        
                        封装外部ajax路径
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="6.2" data-path="md/wx/练习.html">
            
                
                    <a href="../../md/wx/练习.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>6.2.</b>
                        
                        练习
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="7" data-path="md/Egret/canvas.html">
            
                
                    <a href="../../md/Egret/canvas.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.</b>
                        
                        canvas
                    </a>
            
            
            <ul class="articles">
                
    
        <li class="chapter " data-level="7.1" data-path="md/Egret/async.html">
            
                
                    <a href="../../md/Egret/async.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.1.</b>
                        
                        async
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.2" data-path="md/Egret/显示对象与容器.html">
            
                
                    <a href="../../md/Egret/显示对象与容器.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.2.</b>
                        
                        显示对象与容器
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.3" data-path="md/Egret/01.基础.html">
            
                
                    <a href="../../md/Egret/01.基础.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.3.</b>
                        
                        01.基础
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.4" data-path="md/Egret/02.对象池.html">
            
                
                    <a href="../../md/Egret/02.对象池.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.4.</b>
                        
                        02.对象池
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.5" data-path="md/Egret/03.typeScript.html">
            
                
                    <a href="../../md/Egret/03.typeScript.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.5.</b>
                        
                        03.typeScript
                    </a>
            
            
        </li>
    
        <li class="chapter " data-level="7.6" data-path="md/Egret/04.场景管理类.html">
            
                
                    <a href="../../md/Egret/04.场景管理类.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>7.6.</b>
                        
                        04.场景管理类
                    </a>
            
            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="8" data-path="gitbook的安装.html">
            
                
                    <a href="../../gitbook的安装.html">
                
                        <i class="fa fa-check"></i>
                        
                            <b>8.</b>
                        
                        gitbook的安装
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                        <h1 id="1&#x3001;&#x6570;&#x5B57;&#x5BF9;&#x8C61;number">1&#x3001;&#x6570;&#x5B57;&#x5BF9;&#x8C61;(number)</h1>
<p>&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x6570;&#x503C;&#x5BF9;&#x8C61;&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;new&#x5173;&#x952E;&#x8BCD;&#x6765;&#x521B;&#x5EFA;</p>
<p>&#x53EF;&#x4EE5;&#x5728;&#x5C0F;&#x62EC;&#x53F7;&#x91CC;&#x9762;&#x4F20;&#x5165;&#x4E00;&#x4E2A;&#x503C;&#x3002;</p>
<p>&#x53EF;&#x4EE5;&#x901A;&#x8FC7;valueOf()&#x62FF;&#x5230;&#x6570;&#x5B57;&#x5BF9;&#x8C61;&#x7684;&#x503C;&#x3002;</p>
<pre><code>var num=123;
var num1=new Number(23);
console.log(num,num1.valueOf());
console.log(typeof(num1));//object

var num2=Number(89);//&#x7B49;&#x4EF7;&#x4E8E;var num2=89;
console.log(num2,typeof(num2));
</code></pre><h1 id="number&#x5BF9;&#x8C61;&#x7684;&#x5C5E;&#x6027;">Number&#x5BF9;&#x8C61;&#x7684;&#x5C5E;&#x6027;</h1>
<p> MAX_VALUE:&#x6700;&#x5927;&#x503C;</p>
<p> MIN_VALUE&#xFF1A;&#x6700;&#x5C0F;&#x503C;</p>
<p> &#x65B9;&#x6CD5;&#xFF1A;</p>
<p> toString()</p>
<pre><code>var num3=Number.MAX_VALUE;
console.log(num3);
var num1 = Number(89);
console.log(num1.toString());
var num2=0xa;
console.log(num2.toString());//10
</code></pre><h3 id="2&#x3001;&#x5B57;&#x7B26;&#x4E32;&#x5BF9;&#x8C61;">2&#x3001;&#x5B57;&#x7B26;&#x4E32;&#x5BF9;&#x8C61;</h3>
<p>string&#x5BF9;&#x8C61;</p>
<p>&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x6570;&#x7EC4;&#x7684;&#x65B9;&#x6CD5;&#x62FF;&#x5230;&#x5B57;&#x7B26;&#x4E32;&#x91CC;&#x9762;&#x7684;&#x6BCF;&#x4E00;&#x4E2A;&#x5B57;&#x7B26;</p>
<p>&#x901A;&#x8FC7;valueOf()&#x65B9;&#x6CD5;&#x76F4;&#x63A5;&#x62FF;&#x5230;&#x5B57;&#x7B26;&#x4E32;&#x5BF9;&#x8C61;&#x7684;&#x503C;</p>
<pre><code>var str =new String(&quot;&#x6211;&#x662F;&#x5B57;&#x7B26;&#x4E32;&quot;);
console.log(str.valueOf());//console.log(str[0]);
</code></pre><h1 id="string&#x5BF9;&#x8C61;&#x7684;&#x5C5E;&#x6027;">string&#x5BF9;&#x8C61;&#x7684;&#x5C5E;&#x6027;</h1>
<p>constructor&#xFF1A;&#x6307;&#x5411;&#x751F;&#x4EA7;string&#x5BF9;&#x8C61;&#x7684;&#x6784;&#x9020;&#x51FD;&#x6570;</p>
<p>length&#xFF1A;&#x83B7;&#x53D6;string&#x5BF9;&#x8C61;&#x7684;&#x957F;&#x5EA6;</p>
<h2 id="string&#x5BF9;&#x8C61;&#x7684;&#x65B9;&#x6CD5;">string&#x5BF9;&#x8C61;&#x7684;&#x65B9;&#x6CD5;</h2>
<p>1&#x3001;charAt()&#x53EF;&#x4EE5;&#x8FD4;&#x56DE;&#x6307;&#x5B9A;&#x4F4D;&#x7F6E;&#x7684;&#x5B57;&#x7B26;&#x3002;</p>
<pre><code>&#x6CE8;&#x610F;&#xFF1A;&#x5982;&#x679C;&#x4F20;&#x5165;&#x7684;&#x503C;&#x4E0D;&#x5728;&#x5B57;&#x7B26;&#x4E32;&#x7684;&#x957F;&#x5EA6;&#x5185;&#xFF0C;&#x5219;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x7A7A;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x3002;
</code></pre><p>2&#x3001;concat(),&#x7528;&#x4E8E;&#x8FDE;&#x63A5;&#x5B57;&#x7B26;&#x4E32;(&#x4E0D;&#x9650;&#x4E2A;&#x6570;)&#xFF1B;</p>
<pre><code>  &#x6CE8;&#x610F;&#xFF1A;&#x62FC;&#x63A5;&#x540E;&#x4E0D;&#x5F71;&#x54CD;&#x539F;&#x6765;&#x7684;&#x5B57;&#x7B26;&#x4E32;
</code></pre><p>3&#x3001;indexOf(string&#xFF0C;value)&#xFF0C;&#x7528;&#x4E8E;&#x68C0;&#x7D22;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x9996;&#x6B21;&#x51FA;&#x73B0;&#x67D0;&#x4E2A;&#x5B57;&#x7B26;&#x7684;&#x4F4D;&#x7F6E;&#xFF0C;&#x5E76;&#x8FD4;&#x56DE;&#x8BE5;&#x4F4D;&#x7F6E;&#x7684;&#x503C;&#x3002;</p>
<p>string&#xFF1A;&#x4EE3;&#x8868;&#x6211;&#x4EEC;&#x9700;&#x8981;&#x68C0;&#x7D22;&#x7684;&#x5B57;&#x7B26;</p>
<pre><code>value&#xFF1A;&#x4EE3;&#x8868;&#x6211;&#x4EEC;&#x4ECE;&#x5B57;&#x7B26;&#x4E32;&#x7684;&#x4EC0;&#x4E48;&#x4F4D;&#x7F6E;&#x5F00;&#x59CB;&#x68C0;&#x7D22;

&#x5F53;&#x6211;&#x4EEC;&#x68C0;&#x7D22;&#x7684;&#x5B57;&#x7B26;&#x4E0D;&#x5728;&#x5B57;&#x7B26;&#x4E32;&#x91CC;&#x9762;&#x7684;&#x8BDD;&#xFF0C;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;-1
</code></pre><p>4&#x3001;match(),&#x7528;&#x4E8E;&#x68C0;&#x7D22;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x6307;&#x5B9A;&#x7684;&#x503C;&#xFF0C;&#x5E76;&#x8FD4;&#x56DE;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x7B2C;&#x4E00;&#x6B21;&#x51FA;&#x73B0;&#x7684;&#x503C;&#x548C;&#x4F4D;&#x7F6E;&#x3002;</p>
<pre><code>&#x4EE5;&#x6570;&#x7EC4;&#x7684;&#x5F62;&#x5F0F;&#x8F93;&#x51FA;&#xFF0C;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x6570;&#x7EC4;&#x7684;&#x65B9;&#x6CD5;&#x62FF;&#x5230;&#x68C0;&#x7D22;&#x7684;&#x5B57;&#x7B26;&#xFF0C;&#x901A;&#x8FC7;&#x5BF9;&#x8C61;&#x7684;&#x65B9;&#x6CD5;&#x62FF;&#x5230;&#x68C0;&#x7D22;&#x7684;&#x5B57;&#x7B26;&#x5728;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x7684;&#x9996;&#x6B21;&#x51FA;&#x73B0;&#x4E0B;&#x6807;&#x503C;&#x3002;

&#x6CE8;&#x610F;&#xFF1A;&#x5F53;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x6CA1;&#x6709;&#x4F60;&#x8981;&#x68C0;&#x7D22;&#x7684;&#x5B57;&#x7B26;&#xFF0C;&#x4F1A;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;null
</code></pre><p>5&#x3001;replace(oldstr&#xFF0C;newstr),&#x7528;&#x4E8E;&#x66FF;&#x6362;&#x6307;&#x5B9A;&#x7684;&#x5B57;&#x7B26;&#x4E32;,&#x66FF;&#x6362;&#x540E;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x5B57;&#x7B26;&#x4E32;</p>
<pre><code>oldstr:&#x4EE3;&#x8868;&#x7684;&#x662F;&#x9700;&#x8981;&#x66FF;&#x6362;&#x7684;&#x5B57;&#x7B26;&#x4E32;

newstr&#xFF1A;&#x4EE3;&#x8868;&#x7684;&#x662F;&#x66FF;&#x6362;&#x540E;&#x7684;&#x5B57;&#x7B26;&#x4E32;
</code></pre><p>6&#x3001;slice(start&#xFF0C;end)&#xFF0C;&#x7528;&#x4E8E;&#x63D0;&#x53D6;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x7684;&#x67D0;&#x4E00;&#x6BB5;&#x5B57;&#x7B26;&#xFF0C;&#x5E76;&#x8FD4;&#x56DE;&#x8FD9;&#x6BB5;&#x5B57;&#x7B26;&#x4E32;&#x3002;</p>
<pre><code>start:&#x8868;&#x793A;&#x4ECE;&#x4EC0;&#x4E48;&#x4F4D;&#x7F6E;&#x5F00;&#x59CB;&#x63D0;&#x53D6;&#xFF08;&#x5305;&#x62EC;&#x4ED6;&#x672C;&#x8EAB;&#xFF09;

end&#xFF1A;&#x8868;&#x793A;&#x5230;&#x4EC0;&#x4E48;&#x4F4D;&#x7F6E;&#x7ED3;&#x675F;&#x63D0;&#x53D6;&#xFF08;&#x4E0D;&#x5305;&#x62EC;&#x81EA;&#x5DF1;&#xFF09;
</code></pre><p>7&#x3001;split();&#x53EF;&#x4EE5;&#x6307;&#x5B9A;&#x5B57;&#x7B26;(&#x662F;&#x8BE5;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x6709;&#x7684;)&#x6765;&#x628A;&#x5B57;&#x7B26;&#x4E32;&#x5206;&#x5272;&#x4E3A;&#x6570;&#x7EC4;</p>
<pre><code>&#x5982;&#x679C;&#x7528;&#x4E86;&#x5207;&#x5272;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x4E0D;&#x5B58;&#x5728;&#x5728;&#x539F;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#xFF0C;&#x5219;&#x76F4;&#x63A5;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x6570;&#x7EC4;&#xFF0C;&#x91CC;&#x9762;&#x5C31;&#x53EA;&#x6709;&#x4E00;&#x4E2A;&#x503C;(&#x5373;&#x539F;&#x6765;&#x7684;&#x5B57;&#x7B26;&#x4E32;)&#x3002;
</code></pre><p>8&#x3001;substr(start&#xFF0C;length)&#xFF0C;&#x7528;&#x6765;&#x622A;&#x53D6;&#x6307;&#x5B9A;&#x5B57;&#x7B26;&#x7684;&#x5F00;&#x59CB;&#x4F4D;&#x7F6E;&#x548C;&#x957F;&#x5EA6;&#x7684;&#x67D0;&#x6BB5;&#x5B57;&#x7B26;&#x3002;</p>
<pre><code>start&#xFF1A;&#x4EE3;&#x8868;&#x5F00;&#x59CB;&#x622A;&#x53D6;&#x7684;&#x4F4D;&#x7F6E;&#x4E0B;&#x6807;&#x503C;

length&#xFF1A;&#x4EE3;&#x8868;&#x9700;&#x8981;&#x622A;&#x53D6;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x957F;&#x5EA6;
</code></pre><p>9&#x3001;trim(),&#x7528;&#x6765;&#x6E05;&#x9664;&#x5B57;&#x7B26;&#x4E32;&#x4E24;&#x7AEF;&#x7684;&#x7A7A;&#x683C;&#x7684;</p>
<p>10&#x3001;toUpperCase()&#xFF1A;&#x5C06;&#x5B57;&#x7B26;&#x4E32;&#x8F6C;&#x4E3A;&#x5927;&#x5199;(&#x5373;&#x9650;&#x5B57;&#x6BCD;)</p>
<p>11&#x3001;toLowerCase(),&#x5C06;&#x5B57;&#x7B26;&#x4E32;&#x8F6C;&#x6362;&#x4E3A;&#x5C0F;&#x5199;(&#x5373;&#x9650;&#x5B57;&#x6BCD;)    </p>
<pre><code>    console.log(str.constructor);

            var str = &quot;hello world&quot;;
            console.log(str.charAt(4));
            var str1=&quot;how are you!&quot;;
            console.log(str.concat(str1));
            var str2=&quot;I&apos;m fine thanks&quot;;
            var str3 = str.concat(str1,str2);
            console.log(str3);
            console.log(str);
            console.log(str.indexOf(&quot;l&quot;));//2
            console.log(str.indexOf(&quot;l&quot;,6));//9
            console.log(str.indexOf(&quot;z&quot;));//-1

            var str4 =&quot;&#x6211;&#x662F;&#x4E00;&#x53EA;&#x5C0F;&#x5C0F;&#x9E1F;&quot;;
            console.log(str4.indexOf(&quot;&#x9E1F;&quot;));//6

            var str5 =str.match(&quot;l&quot;); 
            console.log(str5);
            console.log(str5[0]);//l
            console.log(str5.index);//2//&#x5B57;&#x7B26;&#x5728;&#x5B57;&#x7B26;&#x4E32;&#x4E2D;&#x7684;&#x9996;&#x6B21;&#x51FA;&#x73B0;&#x4E0B;&#x6807;&#x503C;
            console.log(str.match(&quot;z&quot;));//null

            var str6=&quot;&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x771F;&#x597D;&#xFF0C;&#x597D;&#xFF01;&quot;;
             var str7 = str.replace(&quot;&#x5929;&quot;,&quot;&#x65E5;&quot;);
            console.log(str7);

            var str8=str6.slice(1,2)//&#x63D0;&#x53D6;&#x7B2C;&#x4E00;&#x4E2A;&#x5929;&#x5B57;
            var str9=str6.slice(2,3)//&#x63D0;&#x53D6;&#x7B2C;&#x4E00;&#x4E2A;&#x5929;&#x5B57;
            console.log(str8);
            console.log(str9);

            console.log(str6.split(&quot;&quot;));
            console.log(str6.split(&quot;&#x6C14;&quot;));
            console.log(str6.split(&quot;&#x5929;&quot;));

            console.log(str6.substr(0,6));//&#x4ECA;&#x5929;&#x5929;&#x6C14;&#x771F;&#x597D;

            var str7=&quot; &#x4ECA;&#x5929;&#x665A;&#x4E0A;&#x6709;&#x70B9;&#x70E6;&#x8E81;&#xFF01; &quot;;
            console.log(str7.length);//11
            var str8 = str7.trim();
            console.log(str8.length);//9

            var str9=&quot;hello world&quot;;
            var str10=str9.toUpperCase();
            console.log(str10);//HELLO WORLD

            var str11=str10.toLowerCase();
            console.log(str11);//hello world

            var text=&quot;and in it he says Any damn fool could&quot;;
            console.log(text.slice(18,37));
            console.log(text.slice(0,3));
            console.log(text.slice(32,37));

            var digite = &quot;0123456789&quot;;
            var str=digite.substr(0,5);
            console.log(str.split());

            var str=&quot;&#x4ECA;&#x5929;&#x662F;&#x4EC0;&#x4E48;&#x9B3C;&#x5929;&#x6C14;&#xFF0C;&#x8FD9;&#x4E48;&#x70ED;&#xFF0C;&#x660E;&#x5929;&#x8981;&#x53BB;&#x6E38;&#x6CF3;&#xFF01;&quot;;
            console.log(str.indexOf(&quot;&#x5929;&quot;,1));
            console.log(str.indexOf(&quot;&#x5929;&quot;,5));
            console.log(str.replace(&quot;&#x5929;&quot;,&quot;&#x65E5;&quot;));

            var foo=&quot;get-element-by-id&quot;;
            var z=foo.slice(0,3);
            var x=foo.slice(4,5);
            var c=x.toUpperCase();
            var v=foo.slice(5,11);
            var b=c.concat(v);
            var n=foo.slice(12,13);
            var m=n.toUpperCase();
            var a=foo.slice(13,14);
            var s=m.concat(a);
            var d=foo.slice(15,16);
            var f=d.toUpperCase();
            var g=foo.slice(16,17);
            var h=f.concat(g);
            console.log(z+b+s+h);
</code></pre>
                    
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